Window Channel Balances

A home owner from Baltimore, MD says:
Hello. I am in need of some window channel balances. Attached are pictures of the scenario:

Notice in "window_channel_top" that the channel spring is attached with a single screw. Also notice that the screw hole in "channel_spring_top" is not currently supported and in some cases has become distorted/bent.

The markings indicate that these are TG "jambliners" type balances (but they are not) maybe that is just for weight.

I will need these in white, since they are clearly visible when the windows are closed.

The channels are 9/16" deep and 9/16" wide. I will need several lengths to support the following weight windows:

31" (30TG) to support sash of ~18 lbs (3 windows/6 units needed)

32" (31TG) to support sash of ~19 lbs (2 windows/4 units needed)

Any ideas? Can I modify 770 or 775 by exchanging the balance shoes? I like these since they have support for the top screw. I would prefer to NOT have the ribbed solution.


User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! Yes, you can use our Series 770 or Series 775 channel balances and change the shoe for our 15-014. However, you will need a vice or vice grips to pull and hold the cord while the change is being made. We can also custom make it for you if that would be preferable. Let me know!
A home owner from Baltimore says:
Tom... that is good news... thanks! What are the weight ranges for the 770 series balance (I'm not sure if I should order B or C strength):

31" B?
31" C?
32" B?
32" C?

...and since I'll probably have to stock up on the other size for my house:

35" B?
35" C?
36" B?
36" C?


Profile picture of Tom
Tom from SWISCO responded:
No problem, Paul. The weight ranges you requested are as follows:

-31B: 13 through 19 pounds
-31C: 19 through 24 pounds
-32B: 14 through 20 pounds
-32C: 20 through 25 pounds
-35B: 16 through 22 pounds
-35C: 22 through 27 pounds
-36B: 16 through 22 pounds
-36C: 22 through 27 pounds

Just to clarify, 35B/36B and 35C/36C do indeed have the same weight range between each pair.

Let me know if you have any other questions!
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